I used Microsoft Mappoint to create a complete map of our trip, in quite some detail. It was actually able to find almost all the little roads we took. Besides an accurate main map, there are more-detailed maps of the Colorado, Utah/Wyoming, Southern Idaho, Central Idaho and Montana, Montana through Eastern Washington, and Washington and British Columbia.

And for those that love the real detail: There's a PDF strip map with complete detail of the whole trip. It's big (3.2MB), but really has all the detail.